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Chemistry Equations

Chemistry notes on radioactivity and carbon dating/decay

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Chemistry Equations
radioactivity
fission

Chemical changes: breaking bonds between atoms + rearranging into new compounds. Nuclear Changes: changes in p&n within a nucleus, not between atoms. Half life= time it takes for ? of parent nuclides in radioactive sample to decay. Ex. Element has ? life of 5 seconds left in 1 minutes. So divide 60 sec by 5 sec. = 12. Nuclide: name given to nucleus of a specific isotope that is decaying. Ex. U-238 and U-239. Radiation. Chain rxn: nuclear rxn that becomes self propagating. Critical Mass: minimum amount of original mass undergoing fission to sustain a chain rxn. Nuclear Waste: low level- buried in barrels in the ground (lab wastes, industry) High level- stored in concrete bunkers in ground (spent fuel rods)

Chemistry Formulas And Periodic Table

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MCAT Chemistry Equation Sheet We?ve helped over 50,000 students get better grades since 1999! ORBITALS AND ELECTRONS Quantum numbers descriptions Quantum number Description Possible values Principal quantum number (n) energy level n=1, 2, 3?. Angular momentum quantum number (l) orbital shape (s, p, d, f) l = 0, to ?n- 1 Magnetic quantum number (m) orbital orientation (px, py, pz) m = -l to +l Spin quantum number (ms) describes spin of electron ms = + ? or - ? Each electron has a unique set of quantum numbers. ELECTRONIC CONFIGURATION Electron configuration: describes the location of all of the electrons in an element. e.g. Carbon = 1s22s22p2 Heisenberg Uncertainty Principle: the
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